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C4 transmission leak at linkage

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rickwinn:
looks like it's leaking directly from the linkage itself.  before I take it apart, is there a gasket for the linkage?

rmodel65:
there is an O ring

champion2211:
I have a C4 also and mine leaks in the same place as well as the pan. I have replaced the o ring but thats not a complete fix. Maybe two o rings might do it, or ad a flat washer to take up the difference.  Do you have a tach on yours? I do and my rpms at 70 with a 3.00 rear end mine is turning 3100. To me that sounds a little too high. Hope this helps.

Jeff1967:
Well, I can relate to the C4's pan leaking, I have tried several time to get it stopped in my 67' which includes 3 different gaskets with sealant and without. I just bought a new pan and a thicker poly gasket from NPD spent a couple hours bolting it up today. This time I am trying black RTV gasket maker and the new parts. I am letting the pan and RTV set up all night before I add the ATF tomorrow, If it does not seal this time it is going to a transmission shop and they can tackle the problem, I have had a gut full of this problem.

Will keep you posted ,

JJ

rmodel65:

--- Quote from: champion2211 on June 27, 2009, 09:45:34 PM ---I have a C4 also and mine leaks in the same place as well as the pan. I have replaced the o ring but thats not a complete fix. Maybe two o rings might do it, or ad a flat washer to take up the difference.  Do you have a tach on yours? I do and my rpms at 70 with a 3.00 rear end mine is turning 3100. To me that sounds a little too high. Hope this helps.

--- End quote ---


nah 3000rpm @70 sounds about right for a 3 speed tranny, when i had my AOD in my 91 i had 2.73:1 gears and the aod(cant remember the OD ratio maybe .86:1) my rpm were right around 23-2400 at 70 iirc

the 3spd final gear ratio is 1:1

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